hetgcal> @chip_gap_solve

 chip_gap_solve output  Tue Oct 29 14:20:54 2002

 Measured lines (Spectrum/Wavelength):
MEG/6.6 S2-S3 MEG/8.4 S2-S3 MEG/9.2 S2-S4 MEG/12. S2-S4 MEG/15. S1-S4
 MEG/19. S1-S4 HEG/6.6 S2-S4 HEG/8.4 S1-S4 HEG/9.2 S1-S4 HEG/12. S1-S5
 HEG/15. S0-S5

 Data: Capella 2583 + Level 1.5 values, 6/1/02 dd

 Minus-side wavelengths (MEG, HEG):
      6.65027      8.42272      9.17076      12.1322      15.0168      18.9717
      6.64963      8.42301      9.17035      12.1335      15.0167
 Plus-side wavelengths (MEG, HEG):
      6.64781      8.41935      9.16778      12.1299      15.0127      18.9686
      6.65016      8.42244      9.17056      12.1345      15.0165

 Pixel differences plus - minus :

    -0.221173    -0.303384    -0.268236    -0.202741    -0.371021    -0.281866
    0.0961790    -0.102865    0.0365172     0.170756   -0.0522898

 - - - - - 
 solve matrix equation
 - - - - - 
 Resulting chip gap values: 
    -0.223046    -0.106314    -0.204046   -0.0344689    -0.196251
 NOTE: 3rd value above, S2-S3 gap, includes zeroth-order determination error too.

 and HEG-MEG offset value:      0.154315 pixels
   ( HEG, MEG offset :      0.125199   -0.0291159 )

 Comparing measurements and best fit values:

   Plus - Minus Differences (pixels)
Spec/Wav./chips       Measured       Fit     Difference
MEG/6.6 S2-S3 :     -0.221173    -0.262278      0.041
MEG/8.4 S2-S3 :     -0.303384    -0.262278     -0.041
MEG/9.2 S2-S4 :     -0.268236    -0.227809     -0.040
MEG/12. S2-S4 :     -0.202741    -0.227809      0.025
MEG/15. S1-S4 :     -0.371021    -0.334123     -0.037
MEG/19. S1-S4 :     -0.281866    -0.334123      0.052
HEG/6.6 S2-S4 :     0.0961790    0.0808198      0.015
HEG/8.4 S1-S4 :     -0.102865   -0.0254945     -0.077
HEG/9.2 S1-S4 :     0.0365172   -0.0254945      0.062
HEG/12. S1-S5 :      0.170756     0.170756     -0.000
HEG/15. S0-S5 :    -0.0522898   -0.0522899      0.000

 Resulting (additional) chip offsets in TDETX:
 S0 :      0.533407
 S1 :      0.310360
 S2 :      0.204046
 S3 :     0
 S4 :    -0.0344689
 S5 :     -0.230720